ID:11685 <number> differential I/O pins do not have complementary pins. As a result, the Fitter automatically creates the complementary pins

CAUSE: The specified number of differential I/O pins do not have complementary pins. As a result, the Fitter automatically creates the complementary pins for the differential I/O pins.

ACTION: No action is required. To avoid receiving this message, use the differential buffer primitives to create the positive and negative pins of a differential pin pair.